基于缨帽变换分析地表温度变化

Analysis of surface temperature changes based on Tasseled Cap transform

利用缨帽变换提取土壤亮度指数、绿度植被指数、湿度指数等地表参数,利用模型提取归一化植被指数NDVI、比值植被指数RVI、修改型土壤调整指数MSAVI等植被指数和水体指数MNDWI,利用Artis单窗算法估算热红外波段像元尺度地表温度,将地表温度的影响因素作为BP神经网络输入估算30m空间分辨率的亚像元地表温度,分析1989~2006年桂林城区土地利用变化、缨帽变换特征分量变化、植被参数变化、水体指数变化对地表温度的影响机理。

This paper uses Tasseled Cap transform to extract soil brightness index, vegetation greenness index, humidity index and sur- face parameters, uses the model to extract the normalized difference vegetation index NDVI, ratio vegetation index RVI, amend the soil adjusted vegetation index and other indices MSAVI and Water Index MNDWI, uses Artis single window algorithm to estimate the thermal infrared pixeI scale surface temperature, takes surface temperature factors as BP neural network input to estimate 30 m spatial resolution of sub terlstic component pixel surface temperature. It analizes 1989--2006 Guilin city land usage change, tasseled cap transformation charac change, vegetation parameters, water index change on the mechanism of surface temperature.